JP2022103905A - Film-type battery inspection device and manufacturing method thereof - Google Patents

Film-type battery inspection device and manufacturing method thereof Download PDF

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JP2022103905A
JP2022103905A JP2020218814A JP2020218814A JP2022103905A JP 2022103905 A JP2022103905 A JP 2022103905A JP 2020218814 A JP2020218814 A JP 2020218814A JP 2020218814 A JP2020218814 A JP 2020218814A JP 2022103905 A JP2022103905 A JP 2022103905A
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film
seal portion
heat
temperature
unit
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JP7273786B2 (en
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悟史 中嶋
Satoshi Nakajima
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Prime Planet Energy and Solutions Inc
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Prime Planet Energy and Solutions Inc
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Priority to JP2020218814A priority Critical patent/JP7273786B2/en
Priority to US17/561,878 priority patent/US20220205939A1/en
Priority to CN202111611943.4A priority patent/CN114690048A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/72—Investigating presence of flaws
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4228—Leak testing of cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285—Testing apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

To provide a film-type battery inspection device capable of detecting a defective seal portion of a heat-sealed portion.SOLUTION: An inspection device 200 of a film-type battery 100 according to the present invention includes an electrode body, and a film exterior body that houses the electrode body and has a heat seal portion on the periphery, and further includes a temperature measuring device 210 that measures the temperature distribution of the heat seal portion, and a first determination unit 241 that controls the temperature measuring device within a predetermined time, and determines the presence or absence of a defective seal portion on the basis of the measured temperature distribution after the heat seal portion is formed on the film exterior body.SELECTED DRAWING: Figure 2

Description

本発明は、フィルム型電池の検査装置および製造方法に関する。 The present invention relates to an inspection device and a manufacturing method for a film type battery.

従来、フィルム状の外装部材（以下、フィルム外装体という。）の内部に電極体と電解液とを収容し、周縁をヒートシールすることによって気密に密閉したフィルム型電池が知られている。このようなフィルム型電池は、気密不良箇所があると電解液が漏れるおそれがある。そのため、出荷前に気密性を検査することが一般的である。例えば特許文献１には、フィルム型電池を密封容器に入れ、密閉容器内を減圧する前と後とでフィルム型電池の表面の起伏形状を比較することにより、気密性を検査することが記載されている。 Conventionally, there is known a film-type battery in which an electrode body and an electrolytic solution are housed inside a film-shaped exterior member (hereinafter referred to as a film exterior body) and the peripheral edge is heat-sealed to airtightly seal the battery. In such a film type battery, if there is a poor airtightness, the electrolytic solution may leak. Therefore, it is common to inspect the airtightness before shipping. For example, Patent Document 1 describes that a film-type battery is placed in a sealed container, and the airtightness is inspected by comparing the undulating shape of the surface of the film-type battery before and after decompressing the inside of the closed container. ing.

国際公開２０１１／１５８８７８号International Publication 2011/158878

本発明者の検討によれば、ヒートシールの際に、加熱不良や異物の咬み込みによる加熱不足等が生じると、シール幅が一部狭くなる等、ヒートシール部に部分的な欠損（シール不良個所）が生じることがある。このようなフィルム型電池では、シール不良個所が開裂しやすくなり、使用時に耐圧強度が不足することがありうる。特許文献１の技術では、気密性を検査しうるものの、ヒートシール部のシール不良個所を検出することができない。このため、フィルム型電池の耐圧強度がばらつくおそれがある。 According to the study of the present inventor, if heating failure or insufficient heating due to biting of a foreign substance occurs during heat sealing, the sealing width is partially narrowed and the heat sealing portion is partially defective (sealing failure). Places) may occur. In such a film-type battery, a defective seal portion is likely to be cleaved, and the withstand voltage may be insufficient during use. Although the technique of Patent Document 1 can inspect the airtightness, it cannot detect a defective seal portion of the heat-sealed portion. Therefore, the withstand voltage strength of the film type battery may vary.

本発明は、かかる事情に鑑みてなされたものであり、その目的は、ヒートシール部のシール不良個所を検出することができるフィルム型電池の検査装置、および耐圧強度の安定したフィルム型電池の製造方法を提供することにある。 The present invention has been made in view of such circumstances, and an object thereof is to manufacture a film-type battery inspection device capable of detecting a defective seal portion of a heat-sealed portion, and a film-type battery having a stable withstand voltage strength. To provide a method.

本発明により、電極体と、上記電極体を内部に収容し、周縁にヒートシール部を有するフィルム外装体と、を備えるフィルム型電池の検査装置が提供される。かかる検査装置は、上記ヒートシール部の温度分布を計測する温度計測装置と、上記フィルム外装体に上記ヒートシール部が形成された後、所定の時間内に上記温度計測装置を制御し、計測した上記温度分布に基づいて、シール不良個所の有無を判定する第１判定部と、を備える。 INDUSTRIAL APPLICABILITY According to the present invention, there is provided an inspection device for a film-type battery including an electrode body and a film exterior body containing the electrode body inside and having a heat-sealed portion on a peripheral edge thereof. Such an inspection device controls and measures the temperature measuring device for measuring the temperature distribution of the heat-sealed portion and the temperature measuring device within a predetermined time after the heat-sealed portion is formed on the film exterior body. A first determination unit for determining the presence or absence of a defective seal portion based on the temperature distribution is provided.

上記検査装置によれば、シール不良個所の個所、すなわち、シール幅が一部狭くなっている等の部分的な欠損の有無を、精度よく検出することができる。これにより、耐圧強度の安定したフィルム型電池を提供することができる。 According to the above-mentioned inspection device, it is possible to accurately detect the location of a defective seal, that is, the presence or absence of a partial defect such as a partially narrowed seal width. This makes it possible to provide a film-type battery having a stable withstand voltage.

ここに開示される検査装置の好適な一態様では、上記ヒートシール部の厚み分布を計測する厚み計測装置と、上記フィルム外装体に上記ヒートシール部が形成された後、上記厚み計測装置を制御し、計測した上記厚み分布に基づいて、シール不良個所の有無を判定する第２判定部と、をさらに備える。上記構成により、ヒートシール部のシール不良個所を、３次元的に確認することができ、より高精度に検出することができる。 In a preferred embodiment of the inspection device disclosed herein, the thickness measuring device for measuring the thickness distribution of the heat-sealed portion and the thickness measuring device after the heat-sealed portion is formed on the film exterior body are controlled. Further, a second determination unit for determining the presence or absence of a defective seal portion is further provided based on the measured thickness distribution. With the above configuration, it is possible to three-dimensionally confirm the defective seal portion of the heat seal portion, and it is possible to detect it with higher accuracy.

ここに開示される検査装置の好適な一態様では、上記フィルム型電池は、一端が上記フィルム外装体の内部で上記電極体に電気的に接続され、他端が上記フィルム外装体の外部に延出された端子と、上記端子の上記フィルム外装体と対向する側の面に設けられ、上記フィルム外装体に溶着されているシーラントフィルムと、を備える。上記ヒートシール部は、上記フィルム外装体と上記シーラントフィルムとがヒートシールされた第１シール部と、上記フィルム外装体同士がヒートシールされた第２シール部と、を有する。上記第１判定部は、上記第１シール部と上記第２シール部とを異なる判定基準で判定するように構成されている。第１シール部と第２シール部とでは、例えば、ヒートシールの加熱設定温度や、ヒートシール後の温度の推移（冷め方）が異なりうる。例えば、端子が金属製である場合、第１シール部は第２シール部よりも冷めやすい部分でありうる。第１シール部と第２シール部との判定基準を相互に異ならせることにより、シール不良個所を精度よく検出することができる。 In a preferred embodiment of the inspection apparatus disclosed herein, one end of the film-type battery is electrically connected to the electrode body inside the film exterior body, and the other end extends to the outside of the film exterior body. The terminal is provided with a sealant film provided on the surface of the terminal on the side facing the film outer body and welded to the film outer body. The heat-sealing portion has a first sealing portion in which the film exterior body and the sealant film are heat-sealed, and a second sealing portion in which the film exterior bodies are heat-sealed with each other. The first determination unit is configured to determine the first seal unit and the second seal unit according to different determination criteria. For example, the heating set temperature of the heat seal and the transition (cooling method) of the temperature after the heat seal may be different between the first seal portion and the second seal portion. For example, when the terminal is made of metal, the first seal portion may be a portion that is easier to cool than the second seal portion. By making the determination criteria of the first seal portion and the second seal portion different from each other, it is possible to accurately detect the defective seal portion.

ここに開示される検査装置の好適な一態様では、上記第１判定部は、少なくとも上記第１シール部の上記温度分布を計測するように構成されている。第１シール部では、端子とフィルム外装体との間にシーラントフィルムが介在していることで、第２シール部に比べてシール不良が生じやすくなることがあるが、上記構成によれば、第１シール部におけるシール不良個所を精度よく検出することができる。 In a preferred embodiment of the inspection apparatus disclosed herein, the first determination unit is configured to measure at least the temperature distribution of the first seal unit. In the first seal portion, since the sealant film is interposed between the terminal and the film outer body, a seal defect may be more likely to occur as compared with the second seal portion. However, according to the above configuration, the first seal portion is It is possible to accurately detect a defective seal portion in one seal portion.

ここに開示される検査装置の好適な一態様では、上記第１判定部は、上記所定の時間内に、第１の時間経過後の上記温度分布と、上記第１の時間よりも長い第２の時間経過後の上記温度分布と、を取得して、単位時間あたりの温度変化量を算出し、上記温度変化量に基づいて上記シール不良個所の有無を判定するように構成されている。経時的な温度変化量（ΔＴ）に基づいて良否判定を行うことにより、シール不良個所を高精度に検出することができる。 In a preferred embodiment of the inspection apparatus disclosed herein, the first determination unit has the temperature distribution after the lapse of the first time and the second time longer than the first time within the predetermined time. It is configured to acquire the above-mentioned temperature distribution after the lapse of time, calculate the amount of temperature change per unit time, and determine the presence or absence of the above-mentioned defective seal portion based on the above-mentioned temperature change amount. By making a pass / fail judgment based on the amount of temperature change (ΔT) over time, it is possible to detect a defective seal portion with high accuracy.

また、本発明により、上記ヒートシール部を形成した後、請求項１から５のいずれか１つに記載の検査装置を用いて上記ヒートシール部を検査する工程を含む、フィルム型電池の製造方法が提供される。 Further, according to the present invention, a method for manufacturing a film-type battery, comprising a step of inspecting the heat-sealed portion using the inspection device according to any one of claims 1 to 5 after forming the heat-sealed portion. Is provided.

上記製造方法によれば、気密性や耐久性に優れ、耐圧強度の安定したフィルム型電池を製造することができる。 According to the above manufacturing method, it is possible to manufacture a film-type battery having excellent airtightness and durability and stable withstand voltage strength.

一実施形態に係るフィルム型電池を模式的に示す一部破断の平面図である。It is a partially broken plan view which shows typically the film type battery which concerns on one Embodiment. 一実施形態に係る検査装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the inspection apparatus which concerns on one Embodiment. 一実施形態に係る製造方法を示すフローチャートである。It is a flowchart which shows the manufacturing method which concerns on one Embodiment.

以下、適宜図面を参照しつつ、ここに開示される技術の好適な実施形態を説明する。なお、本明細書において特に言及している事項（例えばフィルム型電池の検査装置および製造方法）以外の事柄であって実施に必要な事柄（例えば、フィルム型電池の一般的な構成や構築プロセス）は、当該分野における従来技術に基づく当業者の設計事項として把握され得る。ここに開示される技術は、本明細書に開示されている内容と当該分野における技術常識とに基づいて実施することができる。また、以下の図面において、同じ作用を奏する部材・部位には同じ符号を付し、重複する説明は省略または簡略化することがある。 Hereinafter, preferred embodiments of the techniques disclosed herein will be described with reference to the drawings as appropriate. It should be noted that matters other than those specifically mentioned in the present specification (for example, inspection equipment and manufacturing method for film-type batteries) and necessary for implementation (for example, general configuration and construction process of film-type batteries). Can be grasped as a design matter of a person skilled in the art based on the prior art in the field. The techniques disclosed herein can be implemented on the basis of what is disclosed herein and the common sense of the art in the art. Further, in the following drawings, members / parts having the same function may be designated by the same reference numerals, and duplicate explanations may be omitted or simplified.

なお、本明細書において「フィルム型電池」とは、フィルム（シート）状の外装部材の内部に電極体を収容した構成の電池全般をいう。また、本明細書において「電池」とは、電気エネルギーを取り出し可能な蓄電デバイス全般を指す用語であって、一次電池と二次電池とを包含する概念である。また、本明細書において「二次電池」とは、繰り返し充放電が可能な蓄電デバイス全般を指す用語であって、リチウムイオン二次電池やニッケル水素電池等のいわゆる蓄電池（化学電池）と、電気二重層キャパシタ等のキャパシタ（物理電池）と、を包含する概念である。 In the present specification, the “film type battery” refers to a general battery having an electrode body housed inside a film (sheet) -shaped exterior member. Further, in the present specification, the term "battery" refers to a general storage device capable of extracting electric energy, and is a concept including a primary battery and a secondary battery. Further, in the present specification, the term "secondary battery" refers to a general power storage device capable of repeatedly charging and discharging, and includes so-called storage batteries (chemical batteries) such as lithium ion secondary batteries and nickel hydrogen batteries, and electricity. It is a concept that includes a capacitor (physical battery) such as a double-layer capacitor.

＜フィルム型電池１００＞
まず、検査対象となるフィルム型電池１００について説明する。図１は、フィルム型電池１００を模式的に示す一部破断の平面図である。フィルム型電池１００は、フィルム外装体１０と、電極体２０と、正極端子３２と、負極端子３４と、電解液（図示せず）と、を備える。フィルム型電池１００は、ここではリチウムイオン二次電池である。正極端子３２および負極端子３４は、端子の一例である。なお、以下の説明において、図面中の符号Ｘ、Ｙ、Ｚは、フィルム型電池１００の短辺方向、短辺方向と直交する長辺方向、厚み方向を、それぞれ表すものとする。長辺方向は、正極端子３２および負極端子３４が延出された方向の一例である。ただし、これらは説明の便宜上の方向に過ぎず、フィルム型電池１００の配置形態を何ら限定するものではない。 <Film type battery 100>
First, the film-type battery 100 to be inspected will be described. FIG. 1 is a partially broken plan view schematically showing the film type battery 100. The film-type battery 100 includes a film exterior body 10, an electrode body 20, a positive electrode terminal 32, a negative electrode terminal 34, and an electrolytic solution (not shown). The film type battery 100 is a lithium ion secondary battery here. The positive electrode terminal 32 and the negative electrode terminal 34 are examples of terminals. In the following description, the reference numerals X, Y, and Z in the drawings represent the short side direction of the film type battery 100, the long side direction orthogonal to the short side direction, and the thickness direction, respectively. The long side direction is an example of the direction in which the positive electrode terminal 32 and the negative electrode terminal 34 are extended. However, these are merely directions for convenience of explanation, and do not limit the arrangement form of the film type battery 100 at all.

フィルム外装体１０は、電極体２０と電解液とを内部に収容する容器である。フィルム外装体１０は、ここではヒートシールを可能にするために、少なくとも内側の面（電極体２０と対向する側の面）が樹脂層で構成されている。樹脂層は、例えば、ポリオレフィン樹脂やポリエステル樹脂等の熱可塑性樹脂で構成されている。ポリオレフィン樹脂としては、例えば、ポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）や、無水マレイン酸変性ポリプロピレン、無水マレイン酸ポリエステル等の酸変性ポリオレフィン樹脂等が挙げられる。フィルム外装体１０は、ここでは、所謂、ラミネートフィルムである。ラミネートフィルムは、例えば従来公知のラミネート型電池に用いられるようなものと同様でよく、特に限定されない。フィルム外装体１０は、例えば、電極体２０に近い側から、第１の樹脂層と、金属層と、第２の樹脂層と、がこの順に積層されて構成されている。 The film exterior body 10 is a container that houses the electrode body 20 and the electrolytic solution inside. Here, in order to enable heat sealing, at least the inner surface (the surface on the side facing the electrode body 20) of the film exterior body 10 is composed of a resin layer. The resin layer is made of a thermoplastic resin such as a polyolefin resin or a polyester resin. Examples of the polyolefin resin include polyethylene (PE), polypropylene (PP), and acid-modified polyolefin resins such as maleic anhydride-modified polypropylene and maleic anhydride polyester. The film exterior body 10 is a so-called laminated film here. The laminated film may be, for example, the same as that used for a conventionally known laminated battery, and is not particularly limited. For example, the film exterior body 10 is configured by laminating a first resin layer, a metal layer, and a second resin layer in this order from the side closer to the electrode body 20.

フィルム外装体１０は、ここでは２枚の矩形状のフィルムを重ね合わせ、周縁をシールすることにより、袋状に形成されている。図１に二点鎖線で示すように、フィルム外装体１０の周縁（ここでは、電極体２０を囲む４辺）には、ヒートシール部１６が形成されている。電極体２０と電解液とは、ヒートシール部１６によってフィルム外装体１０の内部に気密に封止されている。 Here, the film exterior body 10 is formed in a bag shape by superimposing two rectangular films and sealing the peripheral edges. As shown by the alternate long and short dash line in FIG. 1, a heat seal portion 16 is formed on the peripheral edge of the film exterior body 10 (here, four sides surrounding the electrode body 20). The electrode body 20 and the electrolytic solution are hermetically sealed inside the film exterior body 10 by the heat sealing portion 16.

ヒートシール部１６は、ここではフィルム外装体１０の外縁に沿って環状に形成されている。ヒートシール部１６は、第１シール部１７と、第２シール部１８と、で構成されている。第１シール部１７は、フィルム外装体１０と、後述するシーラントフィルム４０と、がヒートシールされた部位である。第１シール部１７は、ここではフィルム外装体１０の長辺方向Ｙの両端部に、それぞれ帯状に形成されている。詳しくは、フィルム外装体１０の正極端子３２が延出された側（長辺方向Ｙの右側）の縁部、および、負極端子３４が延出された側（長辺方向Ｙの左側）の縁部に、それぞれ形成されている。ただし、正極端子３２と負極端子３４とが長辺方向Ｙの一方の端部から共に延出している場合には、長辺方向Ｙの一方側の端部にのみ、第１シール部１７が形成されていてもよい。第１シール部１７は、所定のシール幅（内縁から外縁への垂直長さ）で形成されている。 Here, the heat seal portion 16 is formed in an annular shape along the outer edge of the film exterior body 10. The heat seal portion 16 is composed of a first seal portion 17 and a second seal portion 18. The first sealing portion 17 is a portion where the film exterior body 10 and the sealant film 40, which will be described later, are heat-sealed. Here, the first seal portion 17 is formed in a band shape at both ends of the film exterior body 10 in the long side direction Y. Specifically, the edge of the film exterior 10 on the extended side (right side in the long side direction Y) of the positive electrode terminal 32 and the edge on the extended side (left side in the long side direction Y) of the negative electrode terminal 34. Each part is formed. However, when the positive electrode terminal 32 and the negative electrode terminal 34 both extend from one end of the long side direction Y, the first seal portion 17 is formed only at one end of the long side direction Y. It may have been done. The first seal portion 17 is formed with a predetermined seal width (vertical length from the inner edge to the outer edge).

第２シール部１８は、ヒートシール部１６のうち、第１シール部１７以外の部分である。第２シール部１８は、対向するフィルム外装体１０同士がヒートシールされた部位である。第２シール部１８は、ここでは少なくともフィルム外装体１０の短辺方向Ｘの両端部に、それぞれ帯状に形成されている。ただし、例えば１枚のフィルムを２つ折りにして使用したり、円筒形状のフィルムを使用したりする場合等には、短辺方向Ｘの一方あるいは両方の端部に、第２シール部１８が形成されていなくてもよい。第２シール部１８は、所定のシール幅（内縁から外縁への垂直長さ）で形成されている。第２シール部１８のシール幅は、第１シール部１７と同じであってもよく、異なっていてもよい。 The second seal portion 18 is a portion of the heat seal portion 16 other than the first seal portion 17. The second sealing portion 18 is a portion where the facing film exterior bodies 10 are heat-sealed with each other. Here, the second seal portion 18 is formed in a band shape at least at both ends of the film exterior body 10 in the short side direction X. However, for example, when one film is folded in half or used, or when a cylindrical film is used, a second seal portion 18 is formed at one or both ends of the short side direction X. It does not have to be. The second seal portion 18 is formed with a predetermined seal width (vertical length from the inner edge to the outer edge). The seal width of the second seal portion 18 may be the same as or different from that of the first seal portion 17.

電極体２０の構成は従来公知の電池と同様でよく、特に限定されない。電極体２０は、シート状の正極（正極シート）およびシート状の負極（負極シート）を備えている。図１に示すように、電極体２０は、ここでは、方形状（典型的には矩形状）の正極シートと、方形状（典型的には矩形状）の負極シートとが、絶縁された状態で積層されてなる積層電極体である。ただし、電極体２０は、例えば、帯状の正極シートと帯状の負極シートとが絶縁された状態で積層され、長手方向に捲回されてなる捲回電極体であってもよい。正極は、典型的には、正極集電体と、正極集電体の上に固着され、正極活物質を含む正極活物質層（図示せず）と、を有する。負極は、典型的には、負極集電体と、負極集電体の上に固着され、負極活物質を含む負極活物質層（図示せず）と、を有する。 The configuration of the electrode body 20 may be the same as that of a conventionally known battery, and is not particularly limited. The electrode body 20 includes a sheet-shaped positive electrode (positive electrode sheet) and a sheet-shaped negative electrode (negative electrode sheet). As shown in FIG. 1, in the electrode body 20, here, a rectangular (typically rectangular) positive electrode sheet and a rectangular (typically rectangular) negative electrode sheet are insulated from each other. It is a laminated electrode body that is laminated with. However, the electrode body 20 may be, for example, a wound electrode body in which a band-shaped positive electrode sheet and a band-shaped negative electrode sheet are laminated in an insulated state and wound in the longitudinal direction. The positive electrode typically has a positive electrode current collector and a positive electrode active material layer (not shown) that is fixed onto the positive electrode current collector and contains a positive electrode active material. The negative electrode typically has a negative electrode current collector and a negative electrode active material layer (not shown) fixed on the negative electrode current collector and containing a negative electrode active material.

図１に示すように、電極体２０は、長辺方向Ｙの一方の端部（図１の右端部）に、正極活物質層が形成されていない部分（正極集電体露出部）２２を有する。正極集電体露出部２２は、正極端子３２と接合されている。電極体２０は、長辺方向Ｙの他方の端部（図１の左端部）に、負極活物質層が形成されていない部分（負極集電体露出部）２４を有する。長辺方向Ｙにおいて、負極集電体露出部２４は、ここでは正極集電体露出部２２の反対側に配置されている。負極集電体露出部２４は、負極端子３４と接合されている。 As shown in FIG. 1, the electrode body 20 has a portion (positive electrode current collector exposed portion) 22 on which a positive electrode active material layer is not formed at one end portion (right end portion in FIG. 1) in the long side direction Y. Have. The positive electrode current collector exposed portion 22 is joined to the positive electrode terminal 32. The electrode body 20 has a portion (negative electrode current collector exposed portion) 24 in which the negative electrode active material layer is not formed at the other end portion (left end portion in FIG. 1) in the long side direction Y. In the long side direction Y, the negative electrode current collector exposed portion 24 is arranged here on the opposite side of the positive electrode current collector exposed portion 22. The negative electrode current collector exposed portion 24 is joined to the negative electrode terminal 34.

電解液は、従来公知の電池と同様でよく、特に限定されない。電解液は、例えば、非水系溶媒と支持塩とを含有する非水電解液である。非水系溶媒は、例えば、カーボネート類を含んでいる。支持塩は、例えば、六フッ化リン酸リチウム（ＬｉＰＦ６）等のフッ素含有リチウム塩である。ただし、電解液は固体状（固体電解質）で、電極体２０と一体化されていてもよい。 The electrolytic solution may be the same as that of a conventionally known battery, and is not particularly limited. The electrolytic solution is, for example, a non-aqueous electrolytic solution containing a non-aqueous solvent and a supporting salt. The non-aqueous solvent contains, for example, carbonates. The supporting salt is, for example, a fluorine-containing lithium salt such as lithium hexafluorophosphate (LiPF 6 ). However, the electrolytic solution is in a solid state (solid electrolyte) and may be integrated with the electrode body 20.

正極端子３２は、板状の金属部材である。正極端子３２は、長辺方向Ｙの一方の端部（図１の右端部）に配置されている。正極端子３２の一端は、フィルム外装体１０の内部で、正極集電体露出部２２に電気的に接続されている。正極端子３２の他端は、フィルム外装体１０の外部へと延出されている。 The positive electrode terminal 32 is a plate-shaped metal member. The positive electrode terminal 32 is arranged at one end (right end in FIG. 1) in the long side direction Y. One end of the positive electrode terminal 32 is electrically connected to the positive electrode current collector exposed portion 22 inside the film exterior body 10. The other end of the positive electrode terminal 32 extends to the outside of the film exterior body 10.

図１に示すように、正極端子３２のフィルム外装体１０と対向する側の面の一部には、シーラントフィルム４０が一体化されている。シーラントフィルム４０は、典型的には正極端子３２のフィルム外装体１０と対向する側の面に溶着されている。ただし、シーラントフィルム４０は、接着剤等を用いて正極端子３２に貼り付けられていてもよい。シーラントフィルム４０は、フィルム外装体１０の正極端子３２が延出された側（図１の右側）の縁部に沿って設けられている。シーラントフィルム４０は、短辺方向Ｘに延びている。シーラントフィルム４０の一方の端部（図１の右端部）は、フィルム外装体１０からはみ出している。 As shown in FIG. 1, the sealant film 40 is integrated with a part of the surface of the positive electrode terminal 32 on the side facing the film exterior body 10. The sealant film 40 is typically welded to the surface of the positive electrode terminal 32 on the side facing the film exterior body 10. However, the sealant film 40 may be attached to the positive electrode terminal 32 using an adhesive or the like. The sealant film 40 is provided along the edge of the film exterior 10 on the extended side (right side in FIG. 1) of the positive electrode terminal 32. The sealant film 40 extends in the short side direction X. One end of the sealant film 40 (the right end in FIG. 1) protrudes from the film exterior 10.

シーラントフィルム４０は、正極集電体露出部２２とフィルム外装体１０とが直接接触しないように、正極端子３２を覆っている。シーラントフィルム４０は、対向するフィルム外装体１０と溶着（例えば熱溶着）されている。これにより、図１に示すように、フィルム外装体１０の正極端子３２が延出された側（長辺方向Ｙの右側）の縁部では、正極端子３２とフィルム外装体１０との間にシーラントフィルム４０が介在し、ヒートシール部１６が形成されている。 The sealant film 40 covers the positive electrode terminal 32 so that the positive electrode current collector exposed portion 22 and the film exterior body 10 do not come into direct contact with each other. The sealant film 40 is welded (for example, heat welded) to the facing film exterior body 10. As a result, as shown in FIG. 1, at the edge of the film exterior 10 on the extended side (right side in the long side direction Y), the sealant is between the positive electrode terminal 32 and the film exterior 10. The film 40 is interposed to form the heat seal portion 16.

シーラントフィルム４０は、典型的には樹脂材料からなる。シーラントフィルム４０は、使用する電解液に対する耐性を有し、かつ、フィルム外装体１０の樹脂層（例えば第１の樹脂層）と同程度の温度で溶融する樹脂材料からなるとよい。シーラントフィルム４０は、フィルム外装体１０と正極端子３２の両方に対して好適な接着性を発揮するものあるとよい。シーラントフィルム４０を構成する樹脂材料としては、例えば、フィルム外装体１０の樹脂層を構成し得るものとして例示した熱可塑性樹脂が挙げられる。シーラントフィルム４０は、ポリオレフィンフィルムであってもよい。 The sealant film 40 is typically made of a resin material. The sealant film 40 is preferably made of a resin material that has resistance to the electrolytic solution used and that melts at a temperature comparable to that of the resin layer (for example, the first resin layer) of the film exterior 10. It is preferable that the sealant film 40 exhibits suitable adhesiveness to both the film exterior body 10 and the positive electrode terminal 32. Examples of the resin material constituting the sealant film 40 include thermoplastic resins exemplified as those constituting the resin layer of the film exterior body 10. The sealant film 40 may be a polyolefin film.

負極端子３４は、板状の金属部材である。負極端子３４は、長辺方向Ｙの他方の端部（図１の左端部）に配置されている。長辺方向Ｙにおいて、負極端子３４は、正極端子３２の反対側に配置されている。ただし、正極端子３２と負極端子３４とは、フィルム外装体１０の同じ方向の端部、例えば長辺方向Ｙの一方の端部から共に延出していてもよい。負極端子３４の一端は、フィルム外装体１０の内部で、負極集電体露出部２４に電気的に接続されている。負極端子３４は、長辺方向Ｙに沿って延びている。負極端子３４の他端は、フィルム外装体１０の外部へと延出されている。 The negative electrode terminal 34 is a plate-shaped metal member. The negative electrode terminal 34 is arranged at the other end portion (left end portion in FIG. 1) in the long side direction Y. In the long side direction Y, the negative electrode terminal 34 is arranged on the opposite side of the positive electrode terminal 32. However, the positive electrode terminal 32 and the negative electrode terminal 34 may both extend from one end of the film exterior 10 in the same direction, for example, one end in the long side direction Y. One end of the negative electrode terminal 34 is electrically connected to the negative electrode current collector exposed portion 24 inside the film exterior body 10. The negative electrode terminal 34 extends along the long side direction Y. The other end of the negative electrode terminal 34 extends to the outside of the film exterior body 10.

図１に示すように、負極端子３４のフィルム外装体１０と対向する側の面の一部には、正極端子３２と同様に、シーラントフィルム４０が一体化されている。シーラントフィルム４０は、対向するフィルム外装体１０と溶着（例えば熱溶着）されている。これにより、図１に示すように、フィルム外装体１０の負極端子３４が延出された側（長辺方向Ｙの左側）の縁部では、負極端子３４とフィルム外装体１０との間にシーラントフィルム４０が介在し、ヒートシール部１６が形成されている。 As shown in FIG. 1, a sealant film 40 is integrated with a part of the surface of the negative electrode terminal 34 on the side facing the film exterior body 10 as in the positive electrode terminal 32. The sealant film 40 is welded (for example, heat welded) to the facing film exterior body 10. As a result, as shown in FIG. 1, at the edge of the film exterior 10 on the extended side (left side in the long side direction Y), the sealant is between the negative electrode terminal 34 and the film exterior 10. The film 40 is interposed to form the heat seal portion 16.

＜検査装置２００＞
次に、フィルム型電池１００の検査装置２００について説明する。図２は、検査装置２００の構成を示す模式図である。検査装置２００は、ヒートシール後のフィルム型電池１００について、ヒートシール部１６の所定の検出範囲におけるシール不良個所（部分的な欠損）を検出する装置である。図２に示す検査装置２００は、温度計測装置２１０と、厚み計測装置２２０と、表示装置２３０と、制御装置２４０と、を備えている。ただし、他の実施形態において、厚み計測装置２２０および／または表示装置２３０は、省略することもできる。以下、各構成要素について説明する。 <Inspection device 200>
Next, the inspection device 200 of the film type battery 100 will be described. FIG. 2 is a schematic diagram showing the configuration of the inspection device 200. The inspection device 200 is a device for detecting a defective seal portion (partial defect) in a predetermined detection range of the heat seal portion 16 of the film type battery 100 after heat sealing. The inspection device 200 shown in FIG. 2 includes a temperature measuring device 210, a thickness measuring device 220, a display device 230, and a control device 240. However, in other embodiments, the thickness measuring device 220 and / or the display device 230 may be omitted. Hereinafter, each component will be described.

温度計測装置２１０は、ヒートシール部１６の温度分布を計測する装置である。温度計測装置２１０は、ここではフィルム型電池１００の上方に配置されている。温度計測装置２１０は、例えばフィルム型電池１００の表面温度の分布を可視化するサーモカメラである。温度計測装置２１０は、ここではフィルム型電池１００を上方から撮影し、ヒートシール部１６の全ての部分の温度分布を計測する。ただし、ヒートシール部１６の撮影範囲は、第１シール部１７または第２シール部１８のみであってもよい。温度計測装置２１０は、少なくとも第１シール部１７の温度を計測可能なように構成されていることが好ましい。温度計測装置２１０は、制御装置２４０と電気的に接続されており、制御装置２４０によって制御される。温度計測装置２１０で測定された温度分布（典型的には画像データ、例えば、サーモカメラで撮影されたサーモグラフィー）は、制御装置２４０に入力される。 The temperature measuring device 210 is a device that measures the temperature distribution of the heat seal unit 16. The temperature measuring device 210 is arranged above the film type battery 100 here. The temperature measuring device 210 is, for example, a thermo camera that visualizes the distribution of the surface temperature of the film type battery 100. Here, the temperature measuring device 210 photographs the film-type battery 100 from above and measures the temperature distribution of all parts of the heat-sealed portion 16. However, the imaging range of the heat seal portion 16 may be only the first seal portion 17 or the second seal portion 18. The temperature measuring device 210 is preferably configured so that the temperature of at least the first seal portion 17 can be measured. The temperature measuring device 210 is electrically connected to the control device 240 and is controlled by the control device 240. The temperature distribution measured by the temperature measuring device 210 (typically image data, for example, a thermography taken by a thermo camera) is input to the control device 240.

厚み計測装置２２０は、ヒートシール部１６の厚み分布を計測する装置である。厚み計測装置２２０は、例えば非接触式のセンサである。厚み計測装置２２０は、ここでは厚み方向Ｚに対向配置された発光部２２１と受光部２２２とを備える光学式の測長センサである。発光部２２１と受光部２２２との間には、フィルム型電池１００の少なくともヒートシール部１６の一部が介在可能なように、隙間が空いている。厚み計測装置２２０では、発光部２２１から受光部２２２に向かって光が照射される。発光部２２１は、制御装置２４０と電気的に接続されており、制御装置２４０によって制御される。受光量の値は、受光部２２２から制御装置２４０に入力され、厚みに変換される。 The thickness measuring device 220 is a device that measures the thickness distribution of the heat seal portion 16. The thickness measuring device 220 is, for example, a non-contact type sensor. The thickness measuring device 220 is an optical length measuring sensor including a light emitting unit 221 and a light receiving unit 222 arranged so as to face each other in the thickness direction Z. There is a gap between the light emitting unit 221 and the light receiving unit 222 so that at least a part of the heat seal unit 16 of the film type battery 100 can intervene. In the thickness measuring device 220, light is emitted from the light emitting unit 221 toward the light receiving unit 222. The light emitting unit 221 is electrically connected to the control device 240 and is controlled by the control device 240. The value of the light receiving amount is input to the control device 240 from the light receiving unit 222 and converted into the thickness.

表示装置２３０は、フィルム型電池１００やヒートシール部１６に関する情報を表示する装置である。表示装置２３０は、例えば液晶ディスプレイや有機ＥＬディスプレイである。表示装置２３０は、フィルム型電池１００が良品か不良品かを表示するように構成されていてもよい。表示装置２３０は、温度計測装置２１０で測定された温度分布（例えば、サーモカメラで撮影されたサーモグラフィー）を、例えば色と温度との対応を表す温度グラフとともに、表示するように構成されていてもよい。表示装置２３０は、厚み計測装置２２０で測定された厚み分布を表示するように構成されていてもよい。 The display device 230 is a device that displays information about the film type battery 100 and the heat seal unit 16. The display device 230 is, for example, a liquid crystal display or an organic EL display. The display device 230 may be configured to indicate whether the film-type battery 100 is a non-defective product or a defective product. Even if the display device 230 is configured to display the temperature distribution measured by the temperature measuring device 210 (for example, the thermography taken by the thermo camera) together with the temperature graph showing the correspondence between the color and the temperature, for example. good. The display device 230 may be configured to display the thickness distribution measured by the thickness measuring device 220.

制御装置２４０は、第１判定部２４１と、第２判定部２４２と、通知部２４３と、を備えている。なお、他の実施形態において、第２判定部２４２および／または通知部２４３は省略することもできる。第１判定部２４１は、ヒートシール部１６の温度分布に基づいて、シール不良個所の有無を判定する制御部である。第２判定部２４２は、ヒートシール部１６の厚み分布に基づいて、シール不良個所の有無を判定する制御部である。 The control device 240 includes a first determination unit 241, a second determination unit 242, and a notification unit 243. In other embodiments, the second determination unit 242 and / or the notification unit 243 may be omitted. The first determination unit 241 is a control unit that determines the presence or absence of a defective seal portion based on the temperature distribution of the heat seal unit 16. The second determination unit 242 is a control unit that determines the presence or absence of a defective seal portion based on the thickness distribution of the heat seal unit 16.

通知部２４３は、第１判定部２４１および／または第２判定部２４２の判定結果に基づいて、フィルム型電池１００が良品か不良品かを表示装置２３０に表示する制御部である。詳しくは、通知部２４３は、シール不良個所がない場合に、フィルム型電池１００が良品であると表示し、シール不良個所がある場合に、フィルム型電池１００が不良品であると表示する。通知部２４３は、第１判定部２４１および／または第２判定部２４２の判定結果や、得られた温度分布および／または厚み分布を、そのまま表示装置２３０に表示するように構成されていてもよい。 The notification unit 243 is a control unit that displays on the display device 230 whether the film-type battery 100 is a non-defective product or a defective product based on the determination results of the first determination unit 241 and / or the second determination unit 242. Specifically, the notification unit 243 displays that the film type battery 100 is a good product when there is no defective seal portion, and displays that the film type battery 100 is a defective product when there is a defective seal portion. The notification unit 243 may be configured to display the determination results of the first determination unit 241 and / or the second determination unit 242, and the obtained temperature distribution and / or thickness distribution as they are on the display device 230. ..

制御装置２４０は、例えば、制御プログラムの命令を実行する中央演算処理装置（ＣＰＵ：central processing unit）と、ＣＰＵが実行するプログラムを格納したＲＯＭ（read only memory）と、プログラムを展開するワーキングエリアとして使用されるＲＡＭ（random access memory）と、上記プログラムや各種データを格納するメモリ等の記録装置と、を備えている。制御装置２４０の各部は、ソフトウェアによって構成されていてもよいし、ハードウェアによって構成されていてもよい。制御装置２４０は、温度計測装置２１０と、厚み計測装置２２０と、表示装置２３０とに、それぞれ通信可能に接続されており、これらを制御するように構成されている。 The control device 240 is, for example, a central processing unit (CPU) that executes instructions of a control program, a ROM (read only memory) that stores a program executed by the CPU, and a working area for developing the program. It is equipped with a RAM (random access memory) to be used and a recording device such as a memory for storing the above program and various data. Each part of the control device 240 may be configured by software or hardware. The control device 240 is communicably connected to the temperature measuring device 210, the thickness measuring device 220, and the display device 230, and is configured to control these.

＜フィルム型電池１００の製造方法＞
次に、フィルム型電池１００の製造方法について説明する。図３は製造方法の一例を示すフローチャートである。図３の製造方法は、シール工程（ステップＳ１０）と、検査工程（ステップＳ２０）と、を包含する。検査工程（ステップＳ２０）は、検査装置２００を用いたフィルム型電池１００の検査方法の一例である。検査工程（ステップＳ２０）は、温度計測工程（ステップＳ２１）と、第１判定工程（ステップＳ２２）と、厚み計測工程（ステップＳ２４）と、第２判定工程（ステップＳ２５）と、表示工程（ステップＳ２３、ステップＳ２６、ステップＳ２７）と、を包含する。ただし、他の実施形態において、このうちの一部（例えばステップＳ２４、Ｓ２５）を省略することもできる。また、温度計測工程および第１判定工程よりも前に、厚み計測工程および第２判定工程を行うこともできる。さらに、任意の段階において、他の処理を包含することもできる。 <Manufacturing method of film type battery 100>
Next, a method for manufacturing the film-type battery 100 will be described. FIG. 3 is a flowchart showing an example of the manufacturing method. The manufacturing method of FIG. 3 includes a sealing step (step S10) and an inspection step (step S20). The inspection step (step S20) is an example of an inspection method for the film-type battery 100 using the inspection device 200. The inspection step (step S20) includes a temperature measurement step (step S21), a first determination step (step S22), a thickness measurement step (step S24), a second determination step (step S25), and a display step (step). S23, step S26, step S27) and the like. However, in other embodiments, some of them (for example, steps S24 and S25) may be omitted. Further, the thickness measurement step and the second determination step can be performed before the temperature measurement step and the first determination step. Furthermore, other processes can be included at any stage.

まず、ステップＳ１０では、フィルム外装体１０にヒートシール部１６（第１シール部１７および第２シール部１８）を形成する。例えば一対のラミネートフィルムの間に電解液を含浸させた電極体２０を挟み込み、ラミネートフィルムの周縁をヒートシールする。ヒートシールは、例えば所定の加工温度に加熱されたヒートバーを用いて、樹脂層を熱溶着することによって行いうる。加工温度は、第１シール部１７と第２シール部１８とで異なっていてもよい。ヒートシールにより、フィルム外装体１０の内部に電極体２０が収容され、ヒートシール部１６によってフィルム外装体１０が封止される。そして、ステップＳ２０に進む。 First, in step S10, the heat seal portion 16 (first seal portion 17 and second seal portion 18) is formed on the film exterior body 10. For example, an electrode body 20 impregnated with an electrolytic solution is sandwiched between a pair of laminated films, and the peripheral edge of the laminated films is heat-sealed. The heat seal can be performed, for example, by heat welding the resin layer using a heat bar heated to a predetermined processing temperature. The processing temperature may be different between the first seal portion 17 and the second seal portion 18. The electrode body 20 is housed inside the film exterior body 10 by the heat seal, and the film exterior body 10 is sealed by the heat seal portion 16. Then, the process proceeds to step S20.

なお、シール工程（ステップＳ１０）から検査工程（ステップＳ２０）への動作は、手動で行ってもよいし、制御装置２４０による自動制御で行うようにしてもよい。その場合、例えば従来公知の搬送用アームや搬送用ベルト等の搬送手段を用いて、例えば図２に矢印で示したように、フィルム型電池１００を検査装置２００の近くに搬送すればよい。 The operation from the sealing step (step S10) to the inspection step (step S20) may be performed manually or by automatic control by the control device 240. In that case, the film-type battery 100 may be transported near the inspection device 200, for example, by using a conventionally known transport arm, transport belt, or other transport means, as shown by an arrow in FIG. 2, for example.

次に、ステップＳ２０では、検査装置２００を用いて、検査対象であるフィルム型電池１００のヒートシール部１６を検査する。詳しくは、まず、温度計測工程（ステップＳ２１）において、第１判定部２４１は、ヒートシール部１６の温度分布を取得する。例えば本工程を制御装置２４０による自動制御で実行する場合、第１判定部２４１は、搬送手段を制御して、フィルム型電池１００を温度計測装置２１０の真下に移動させる。第１判定部２４１は、ステップＳ１０でヒートシール部１６が形成された後、所定の時間内に、温度計測装置２１０を制御して、ヒートシール部１６（具体的には、第１シール部１７および／または第２シール部１８）の温度分布を取得する。所定の時間は、ヒートシール部１６の温まった状態が維持されている時間である。第１判定部２４１は、ここでは所定の時間内に１回だけ温度計測装置２１０を駆動させて、第１の時間経過後のヒートシール部１６の温度分布を取得する。 Next, in step S20, the heat-sealed portion 16 of the film-type battery 100 to be inspected is inspected using the inspection device 200. Specifically, first, in the temperature measurement step (step S21), the first determination unit 241 acquires the temperature distribution of the heat seal unit 16. For example, when this process is executed by automatic control by the control device 240, the first determination unit 241 controls the transport means to move the film type battery 100 directly below the temperature measuring device 210. The first determination unit 241 controls the temperature measuring device 210 within a predetermined time after the heat seal unit 16 is formed in step S10, and the heat seal unit 16 (specifically, the first seal unit 17). And / or acquire the temperature distribution of the second seal portion 18). The predetermined time is the time during which the heat-sealed portion 16 is maintained in a warm state. Here, the first determination unit 241 drives the temperature measuring device 210 only once within a predetermined time, and acquires the temperature distribution of the heat seal unit 16 after the lapse of the first time.

温度分布は、ここでは、環状に形成されたヒートシール部１６の全周にわたって、平面視の位置と測定温度との関係を示すデータである。ただし、帯状に形成された第１シール部１７のみについて、平面視の位置と測定温度との関係を示すデータであってもよいし、第２シール部１８のみについて、平面視の位置と測定温度との関係を示すデータであってもよい。温度分布は、例えば、撮影範囲を短辺方向Ｘおよび長辺方向Ｙに等間隔に区分した各撮影部について、短辺方向Ｘの座標と、長辺方向Ｙの座標と、測定温度との３つの値からなる組の群として構成されていてもよい。そして、ステップＳ２２に進む。 Here, the temperature distribution is data showing the relationship between the position in a plan view and the measured temperature over the entire circumference of the heat seal portion 16 formed in an annular shape. However, the data may be data showing the relationship between the position in the plan view and the measured temperature only for the first seal portion 17 formed in a band shape, or the position and the measured temperature in the plan view only for the second seal portion 18. It may be data showing the relationship with. The temperature distribution is, for example, 3 of the coordinates of the short side direction X, the coordinates of the long side direction Y, and the measured temperature for each shooting unit in which the shooting range is divided into the short side direction X and the long side direction Y at equal intervals. It may be configured as a set of two values. Then, the process proceeds to step S22.

次に、第１判定工程（ステップＳ２２）において、第１判定部２４１は、ステップＳ２１で取得した温度分布に基づいて、シール不良個所の有無を判定する。シール不良個所の有無の判定は、例えば、各撮影部の測定温度と、判定基準として予め設定された温度閾値と、を対比することによって行いうる。温度閾値は、例えばヒートシールに用いるヒートバーの加熱設定温度や、ステップＳ１０からの経過時間、フィルム外装体１０および／またはシーラントフィルム４０の物性（例えば、樹脂層の溶融温度）等に基づいて設定され、第１判定部２４１に記憶されている。温度閾値は、典型的には第１シール部１７と第２シール部１８とで相互に異なっている。第１シール部１７の温度閾値は、例えば、フィルム外装体１０とシーラントフィルム４０との溶着温度や、正極端子３２および／または負極端子３４の材質等に基づいて設定されていてもよい。第２シール部１８の温度閾値は、例えば、フィルム外装体１０同士の溶着温度に基づいて設定されていてもよい。 Next, in the first determination step (step S22), the first determination unit 241 determines whether or not there is a defective seal portion based on the temperature distribution acquired in step S21. The presence or absence of a defective seal can be determined, for example, by comparing the measured temperature of each imaging unit with a temperature threshold set in advance as a determination criterion. The temperature threshold is set based on, for example, the heating set temperature of the heat bar used for heat sealing, the elapsed time from step S10, the physical properties of the film exterior 10 and / or the sealant film 40 (for example, the melting temperature of the resin layer), and the like. , Is stored in the first determination unit 241. The temperature thresholds are typically different between the first seal portion 17 and the second seal portion 18. The temperature threshold of the first sealing portion 17 may be set based on, for example, the welding temperature between the film exterior 10 and the sealant film 40, the material of the positive electrode terminal 32 and / or the negative electrode terminal 34, and the like. The temperature threshold value of the second sealing portion 18 may be set, for example, based on the welding temperature between the film exterior bodies 10.

ヒートシール部１６に加熱不良や異物の咬み込みによる加熱不足等が生じると、ヒートシール部１６の温度が部分的に低くなる。第１判定部２４１は、各撮影部の測定温度がいずれも温度閾値以上である場合に、シール不良個所がない（Ｓ２２：ＹＥＳ）と判定する。第１判定部２４１は、ここでは、ヒートシール部１６の全周にわたる位置と測定温度との関係を示すデータにおいて、測定温度がいずれも温度閾値以上である場合に、シール不良個所がない（Ｓ２２：ＹＥＳ）と判定する。ただし、第１判定部２４１は、例えば、温度計測工程（ステップＳ２１）で第１シール部１７または第２シール部１８のみの温度分布を取得した場合等には、第１シール部１７または第２シール部１８の位置と測定温度との関係を示すデータにおいて、測定温度がいずれも温度閾値以上である場合に、シール不良個所がないと判定してもよい。そして、ステップＳ２４に進む。 When the heat-sealed portion 16 is poorly heated or insufficiently heated due to the biting of a foreign substance, the temperature of the heat-sealed portion 16 is partially lowered. When the measured temperature of each photographing unit is equal to or higher than the temperature threshold value, the first determination unit 241 determines that there is no defective seal (S22: YES). Here, in the data showing the relationship between the position over the entire circumference of the heat seal unit 16 and the measured temperature, the first determination unit 241 has no sealing defective part when the measured temperatures are all equal to or higher than the temperature threshold (S22). : YES) is determined. However, when the first determination unit 241 acquires the temperature distribution of only the first seal unit 17 or the second seal unit 18 in the temperature measurement step (step S21), for example, the first seal unit 17 or the second seal unit 17 or the second. In the data showing the relationship between the position of the seal portion 18 and the measured temperature, if the measured temperatures are all equal to or higher than the temperature threshold, it may be determined that there is no defective seal. Then, the process proceeds to step S24.

一方、第１判定部２４１は、少なくとも１つの撮影部について測定温度が温度閾値未満である場合に、シール不良個所がある（Ｓ２２：ＮＯ）と判定する。第１判定部２４１は、ここでは、ヒートシール部１６の全周にわたる位置と測定温度との関係を示すデータにおいて、測定温度が一箇所でも温度閾値未満である場合に、シール不良個所がある（Ｓ２２：ＮＯ）と判定する。ただし、第１判定部２４１は、例えば、温度計測工程（ステップＳ２１）で第１シール部１７または第２シール部１８のみ温度分布を取得した場合等には、第１シール部１７または第２シール部１８の位置と測定温度との関係を示すデータにおいて、測定温度が一箇所でも温度閾値未満である場合に、シール不良個所がある（Ｓ２２：ＮＯ）と判定してもよい。そして、ステップＳ２３に進む。表示工程（ステップＳ２３）において、通知部２４３は、検査対象であるフィルム型電池１００が不良品であることを表示装置２３０に表示する。そして制御を終了する。 On the other hand, the first determination unit 241 determines that there is a defective seal portion (S22: NO) when the measurement temperature of at least one imaging unit is less than the temperature threshold value. Here, the first determination unit 241 has a seal defect portion when the measurement temperature is less than the temperature threshold even at one location in the data showing the relationship between the position over the entire circumference of the heat seal unit 16 and the measurement temperature (the first determination unit 241 has a seal defect location). S22: NO) is determined. However, when the first determination unit 241 acquires the temperature distribution only for the first seal unit 17 or the second seal unit 18 in the temperature measurement step (step S21), for example, the first seal unit 17 or the second seal unit 241 In the data showing the relationship between the position of the unit 18 and the measured temperature, if the measured temperature is less than the temperature threshold even at one place, it may be determined that there is a defective seal part (S22: NO). Then, the process proceeds to step S23. In the display step (step S23), the notification unit 243 displays on the display device 230 that the film-type battery 100 to be inspected is a defective product. Then, the control is terminated.

次に、厚み計測工程（ステップＳ２４）において、第２判定部２４２は、ヒートシール部１６（具体的には、第１シール部１７および／または第２シール部１８）の厚み分布を取得する。例えば本工程を制御装置２４０による自動制御で実行する場合、第２判定部２４２は、所定の計測範囲のなかでフィルム型電池１００を移動させると共に、厚み計測装置２２０を制御して、発光部２２１から光を出射させ、受光部２２２から受光量の値を受信する。第２判定部２４２では、受光量に基づいて厚み分布が生成される。厚み分布は、例えば、環状に形成されたヒートシール部１６の全周にわたって、平面視の位置と測定厚みとの関係を示すデータである。ただし、帯状に形成された第１シール部１７のみについて、平面視の位置と測定厚みとの関係を示すデータであってもよいし、第２シール部１８のみについて、平面視の位置と測定厚みとの関係を示すデータであってもよい。厚み分布は、例えば、計測範囲の短辺方向Ｘおよび／または長辺方向Ｙの座標と、測定厚みとが対応付けられた群として構成されていてもよい。そして、ステップＳ２５に進む。 Next, in the thickness measurement step (step S24), the second determination unit 242 acquires the thickness distribution of the heat seal unit 16 (specifically, the first seal unit 17 and / or the second seal unit 18). For example, when this process is automatically controlled by the control device 240, the second determination unit 242 moves the film type battery 100 within a predetermined measurement range and controls the thickness measuring device 220 to control the light emitting unit 221. Light is emitted from the light receiving unit 222, and the value of the light receiving amount is received from the light receiving unit 222. The second determination unit 242 generates a thickness distribution based on the amount of light received. The thickness distribution is, for example, data showing the relationship between the position in a plan view and the measured thickness over the entire circumference of the heat-sealed portion 16 formed in an annular shape. However, the data may be data showing the relationship between the position in the plan view and the measured thickness only for the first seal portion 17 formed in a band shape, or the position and the measured thickness in the plan view only for the second seal portion 18. It may be data showing the relationship with. The thickness distribution may be configured as a group in which the coordinates of the short side direction X and / or the long side direction Y of the measurement range and the measurement thickness are associated with each other, for example. Then, the process proceeds to step S25.

次に、第２判定工程（ステップＳ２５）において、第２判定部２４２は、ステップＳ２４で取得した厚み分布に基づいて、シール不良個所の有無を判定する。シール不良個所の有無の判定は、例えば、測定厚みと、判定基準として予め設定された基準厚み範囲と、を対比することによって行いうる。基準厚み範囲は、例えばフィルム外装体１０、シーラントフィルム４０、正極端子３２および／または負極端子３４の厚み等に基づいて設定され、第２判定部２４２に記憶されている。基準厚み範囲は、典型的には第１シール部１７と第２シール部１８とで相互に異なっている。 Next, in the second determination step (step S25), the second determination unit 242 determines whether or not there is a defective seal portion based on the thickness distribution acquired in step S24. The presence or absence of a defective seal can be determined, for example, by comparing the measured thickness with a reference thickness range preset as a determination standard. The reference thickness range is set based on, for example, the thickness of the film exterior body 10, the sealant film 40, the positive electrode terminal 32 and / or the negative electrode terminal 34, and is stored in the second determination unit 242. The reference thickness range is typically different between the first seal portion 17 and the second seal portion 18.

例えばフィルム外装体１０に皺があったり、ヒートシール時にシーラントフィルム４０が撚れたりすると、ヒートシール部１６の厚みが部分的に薄くなったり厚くなったりする。第２判定部２４２は、測定厚みがいずれも基準厚み範囲内である場合に、シール不良個所がない（Ｓ２５：ＹＥＳ）と判定する。第２判定部２４２は、例えば、ヒートシール部１６の全周にわたる位置と測定厚みとの関係を示すデータにおいて、測定厚みがいずれも基準厚み範囲内である場合に、シール不良個所がない（Ｓ２５：ＹＥＳ）と判定する。ただし、第２判定部２４２は、例えば、厚み計測工程（ステップＳ２４）で第１シール部１７または第２シール部１８のみの厚み分布を取得した場合等には、第１シール部１７または第２シール部１８の位置と測定厚みとの関係を示すデータにおいて、測定厚みがいずれも基準厚み範囲内である場合に、シール不良個所がない（Ｓ２５：ＹＥＳ）と判定してもよい。そして、ステップＳ２６に進む。表示工程（ステップＳ２６）において、通知部２４３は、検査対象であるフィルム型電池１００が良品であることを表示装置２３０に表示する。そして制御を終了する。 For example, if the film exterior 10 is wrinkled or the sealant film 40 is twisted during heat sealing, the thickness of the heat sealing portion 16 is partially reduced or increased. The second determination unit 242 determines that there is no defective seal (S25: YES) when all the measured thicknesses are within the reference thickness range. For example, in the data showing the relationship between the position over the entire circumference of the heat seal unit 16 and the measured thickness, the second determination unit 242 does not have a defective seal portion when all the measured thicknesses are within the reference thickness range (S25). : YES) is determined. However, when the second determination unit 242 obtains the thickness distribution of only the first seal unit 17 or the second seal unit 18 in the thickness measurement step (step S24), for example, the first seal unit 17 or the second seal unit 242 In the data showing the relationship between the position of the seal portion 18 and the measured thickness, it may be determined that there is no defective seal portion (S25: YES) when all the measured thicknesses are within the reference thickness range. Then, the process proceeds to step S26. In the display step (step S26), the notification unit 243 displays on the display device 230 that the film-type battery 100 to be inspected is a non-defective product. Then, the control is terminated.

一方、第２判定部２４２は、少なくとも１箇所の測定厚みが基準厚み範囲外である場合に、シール不良個所がある（Ｓ２５：ＮＯ）と判定する。第２判定部２４２は、例えば、ヒートシール部１６の全周にわたる位置と測定厚みとの関係を示すデータにおいて、測定厚みが一箇所でも基準厚み範囲外である場合に、シール不良個所がある（Ｓ２５：ＮＯ）と判定する。ただし、第２判定部２４２は、例えば、厚み計測工程（ステップＳ２４）で第１シール部１７または第２シール部１８のみの厚み分布を取得した場合等には、第１シール部１７または第２シール部１８の位置と測定厚みとの関係を示すデータにおいて、測定厚みが一箇所でも基準厚み範囲外である場合に、シール不良個所がある（Ｓ２５：ＮＯ）と判定してもよい。そして、ステップＳ２７に進む。表示工程（ステップＳ２７）において、通知部２４３は、検査対象であるフィルム型電池１００が不良品であることを表示装置２３０に表示する。そして制御を終了する。 On the other hand, the second determination unit 242 determines that there is a defective seal portion (S25: NO) when the measured thickness at at least one location is outside the reference thickness range. For example, in the data showing the relationship between the position over the entire circumference of the heat seal unit 16 and the measured thickness, the second determination unit 242 has a defective seal portion when the measured thickness is outside the reference thickness range even at one location (the second determination unit 242). S25: NO) is determined. However, when the second determination unit 242 obtains the thickness distribution of only the first seal unit 17 or the second seal unit 18 in the thickness measurement step (step S24), for example, the first seal unit 17 or the second seal unit 242 In the data showing the relationship between the position of the seal portion 18 and the measured thickness, it may be determined that there is a defective seal portion (S25: NO) when the measured thickness is outside the reference thickness range even at one location. Then, the process proceeds to step S27. In the display step (step S27), the notification unit 243 displays on the display device 230 that the film-type battery 100 to be inspected is a defective product. Then, the control is terminated.

以上のように、検査装置２００によれば、ヒートシール部１６のシール不良個所の有無を、精度よく検出することができる。また、上記製造方法によれば、耐圧強度の安定したフィルム型電池１００を製造することができる。 As described above, according to the inspection device 200, it is possible to accurately detect the presence or absence of a defective seal portion of the heat seal portion 16. Further, according to the above manufacturing method, it is possible to manufacture a film type battery 100 having a stable withstand voltage strength.

以上、本発明の具体例を詳細に説明したが、これらは例示にすぎず、請求の範囲を限定するものではない。請求の範囲に記載の技術には、以上に例示した具体例を様々に変形、変更したものが含まれる。 Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The techniques described in the claims include various modifications and modifications of the specific examples exemplified above.

上記した実施形態では、第１判定部２４１が、所定の時間内に１回だけ温度計測装置２１０を駆動させて、第１の時間経過後の温度分布を取得するように構成されていた。しかし、これには限定されない。第１判定部２４１は、所定の時間内に２回以上、温度計測装置２１０を駆動させて、温度の過渡変化を複数回にわたり撮影してもよい。第１判定部２４１は、所定の時間内に、第１の時間経過後の温度分布と、第１の時間よりも長い第２の時間経過後の温度分布と、を取得してもよい。その場合、第１判定部２４１は、各撮影部について、第２の時間経過後の温度分布と第１の時間経過後の温度分布との比較から、時間的な差分を取ることで単位時間あたりの温度変化量（ΔＴ）を算出し、温度変化量の分布を生成してもよい。第１判定部２４１において、シール不良個所の有無を判定は、各撮影部について、温度変化量と、判定基準として予め設定された温度変化量閾値とを対比することによって行ってもよい。 In the above-described embodiment, the first determination unit 241 is configured to drive the temperature measuring device 210 only once within a predetermined time to acquire the temperature distribution after the lapse of the first time. However, it is not limited to this. The first determination unit 241 may drive the temperature measuring device 210 twice or more within a predetermined time to photograph the transient change in temperature a plurality of times. The first determination unit 241 may acquire the temperature distribution after the lapse of the first time and the temperature distribution after the lapse of the second time, which is longer than the first time, within a predetermined time. In that case, the first determination unit 241 takes a time difference from the comparison between the temperature distribution after the lapse of the second time and the temperature distribution after the lapse of the first time for each photographing unit, and by taking a time difference per unit time. The temperature change amount (ΔT) may be calculated to generate a distribution of the temperature change amount. The first determination unit 241 may determine the presence or absence of a defective seal portion by comparing the temperature change amount with the temperature change amount threshold set in advance as a determination criterion for each imaging unit.

１０ フィルム外装体
１６ ヒートシール部
１７ 第１シール部
１８ 第２シール部
２０ 電極体
４０ シーラントフィルム
１００ フィルム型電池
２００ 検査装置
２１０ 温度計測装置
２２０ 厚み計測装置
２３０ 表示装置
２４０ 制御装置
２４１ 第１判定部
２４２ 第２判定部
２４３ 通知部

10 Film exterior 16 Heat seal 17 First seal 18 Second seal 20 Electrode 40 Sealant film 100 Film type battery 200 Inspection device 210 Temperature measurement device 220 Thickness measurement device 230 Display device 240 Control device 241 First judgment unit 242 Second judgment unit 243 Notification unit

Claims (6)

電極体と、前記電極体を内部に収容し、周縁にヒートシール部を有するフィルム外装体と、を備えるフィルム型電池の検査装置であって、
前記ヒートシール部の温度分布を計測する温度計測装置と、
前記フィルム外装体に前記ヒートシール部が形成された後、所定の時間内に前記温度計測装置を制御し、計測した前記温度分布に基づいて、シール不良個所の有無を判定する第１判定部と、を備える、検査装置。 An inspection device for a film-type battery including an electrode body and a film exterior body that houses the electrode body and has a heat-sealed portion on the peripheral edge thereof.
A temperature measuring device that measures the temperature distribution of the heat seal portion, and
After the heat seal portion is formed on the film exterior body, the temperature measuring device is controlled within a predetermined time, and the first determination unit that determines the presence or absence of a defective seal portion based on the measured temperature distribution. , Equipped with an inspection device. 前記ヒートシール部の厚み分布を計測する厚み計測装置と、
前記フィルム外装体に前記ヒートシール部が形成された後、前記厚み計測装置を制御し、計測した前記厚み分布に基づいて、シール不良個所の有無を判定する第２判定部と、をさらに備える、
請求項１に記載の検査装置。 A thickness measuring device that measures the thickness distribution of the heat-sealed portion, and
After the heat seal portion is formed on the film exterior body, the thickness measuring device is further provided with a second determination unit for controlling the thickness measuring device and determining the presence or absence of a defective seal portion based on the measured thickness distribution.
The inspection device according to claim 1. 前記フィルム型電池は、
一端が前記フィルム外装体の内部で前記電極体に電気的に接続され、他端が前記フィルム外装体の外部に延出された端子と、
前記端子の前記フィルム外装体と対向する側の面に設けられ、前記フィルム外装体に溶着されているシーラントフィルムと、を備え、
前記ヒートシール部は、
前記フィルム外装体と前記シーラントフィルムとがヒートシールされた第１シール部と、
前記フィルム外装体同士がヒートシールされた第２シール部と、
を有し、
前記第１判定部は、前記第１シール部と前記第２シール部とを異なる判定基準で判定するように構成されている、
請求項１または２に記載の検査装置。 The film type battery is
A terminal having one end electrically connected to the electrode body inside the film exterior body and the other end extending to the outside of the film exterior body.
A sealant film provided on the surface of the terminal on the side facing the film exterior and welded to the film exterior is provided.
The heat seal portion is
A first sealing portion in which the film exterior and the sealant film are heat-sealed, and
A second seal portion in which the film exteriors are heat-sealed, and
Have,
The first determination unit is configured to determine the first seal unit and the second seal unit according to different determination criteria.
The inspection device according to claim 1 or 2. 前記第１判定部は、少なくとも前記第１シール部の前記温度分布を計測するように構成されている、
請求項３に記載の検査装置。 The first determination unit is configured to measure at least the temperature distribution of the first seal unit.
The inspection device according to claim 3. 前記第１判定部は、前記所定の時間内に、第１の時間経過後の前記温度分布と、前記第１の時間よりも長い第２の時間経過後の前記温度分布と、を取得して、単位時間あたりの温度変化量を算出し、前記温度変化量に基づいて前記シール不良個所の有無を判定するように構成されている、
請求項１から４のいずれか１つに記載の検査装置。 The first determination unit acquires the temperature distribution after the lapse of the first time and the temperature distribution after the lapse of the second time longer than the first time within the predetermined time. , The amount of temperature change per unit time is calculated, and the presence or absence of the defective seal portion is determined based on the amount of temperature change.
The inspection device according to any one of claims 1 to 4. 前記ヒートシール部を形成した後、請求項１から５のいずれか１つに記載の検査装置を用いて前記ヒートシール部を検査する工程を含む、フィルム型電池の製造方法。

A method for manufacturing a film-type battery, comprising a step of inspecting the heat-sealed portion using the inspection apparatus according to any one of claims 1 to 5 after forming the heat-sealed portion.
JP2020218814A 2020-12-28 2020-12-28 FILM-TYPE BATTERY INSPECTION APPARATUS AND MANUFACTURING METHOD Active JP7273786B2 (en)

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US17/561,878 US20220205939A1 (en) 2020-12-28 2021-12-24 Inspection device and manufacturing method of film-type battery
CN202111611943.4A CN114690048A (en) 2020-12-28 2021-12-27 Inspection device and manufacturing method for thin film battery

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JP2002225929A (en) * 2001-01-31 2002-08-14 Toshiba Corp Pack container, manufacturing method thereof, and battery device
JP2007022651A (en) * 2005-07-13 2007-02-01 Yuichiro Sakai Method for distinguishing inspection of heat seal inferiority of package
JP2010097853A (en) * 2008-10-17 2010-04-30 Dainippon Printing Co Ltd Metallic terminal film and metallic terminal bonded with same

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JP2002225929A (en) * 2001-01-31 2002-08-14 Toshiba Corp Pack container, manufacturing method thereof, and battery device
JP2007022651A (en) * 2005-07-13 2007-02-01 Yuichiro Sakai Method for distinguishing inspection of heat seal inferiority of package
JP2010097853A (en) * 2008-10-17 2010-04-30 Dainippon Printing Co Ltd Metallic terminal film and metallic terminal bonded with same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024085394A1 (en) * 2022-10-18 2024-04-25 주식회사 엘지에너지솔루션 Detection device for detecting defect of electrode and operation method thereof

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